<template>
  <h4>当前求和为：{{sum}}</h4>
  <button @click="sum++">点我++</button>
  <hr>
  <h2>姓名：{{name}}</h2>
  <h2>年龄：{{age}}</h2>
  <h2>薪资：{{job.j1.salary}}K</h2>
  <h2 v-show="person.car">座驾信息{{person.car}}</h2>
  <button @click="name+='~'">修改姓名</button>
  <button @click="age++">增长年龄</button>
  <button @click="job.j1.salary++">涨薪</button>
  <button @click="showRawPerson">输出最原始的person</button>
  <button @click="addCar">给人添加一台车</button>
  <button @click="person.car.name+='!!!'">换车名</button>
  <button @click="changePrice">换价格</button>
</template>
<script>
import {ref,reactive,toRefs,toRaw,markRaw} from 'vue'
export default {
  name: 'Demo',
  setup() {
    // 数据
    let sum = ref(0)
    let person = reactive({
      name: '张三',
      age: 18,
      job: {
        j1: {
          salary: 20
        }
      }
    })

    function showRawPerson () {
      const p = toRaw(person)
      p.age++
      console.log(p)
    }

    function addCar () {
      let car = {name:'奔驰',price:40}
      person.car = markRaw(car)
    }

    function changePrice () {
      person.car.price++
      console.log(person.car.price)
    }
    
    // 返回一个对象（常用）
    return {
      sum,
      person,
      ...toRefs(person),
      showRawPerson,
      addCar,
      changePrice
    }
  }
}
</script>
